moldy peat pots

A "little mold" isn't great cause for concern. When you have warmth and moisture and a good growing medium, stuff grows. If your seedlings are healthy, there probably isn't a significant problem. Good air circulation and not over-watering should keep them healthy. "Cool and wet" is ideal for fungus. A sterile starter mix should reduce the chance of lethal fungi taking hold, but even so, molds and spores in the air may take advantage of a comfy spot. Not usually a cause for great concern.